The fact that Roger Ebert called John Hughes the "philosopher of adolescence" obscures the fact that he was to a larger degree a commercially highly successful writer, producer and also director of mainstream movies in general. Not all of them were great -- I think that Weird Science, for example, is crap (great title though). The documentary works great when we see all those familiar faces from his best movies such as "Ferris Bueller's Day Off" thirty years later talking about their joyful memories from when they were young and stars. Then there is a lot of eulogizing from teenagers who say that modern movies don't know what teenagers are about, but teenagers probably always would say that.
To give the documentary a framework, the contributors to the documentary then set off to visit John Hughes at his home in Chicago, ostensibly to ask him to direct another teen movie. This charade is kind of annoying because it changes the focus of the documentary from Hughes to the film team, which we don't really care for all that much. Hughes of course doesn't come out to meet the camera crew, and later returns their letter without any further reply or comment. A short while after, he dies of a heart attack in New York City.
The movies has its ups (the interviews with the actors) and downs (the eulogizing of the "good old times of teen cinema when actors didn't divulge their private life on Facebook"), but overall it was nice to get a bit more insight into John Hughes' work.